Means for keeping margins clean in intaglio-printing.



H. A. W. WOOD. MEANS FOR KEEPING MARGINS CLEAN IN INTAGLIO PRINTING.APPLICATION mum JAN. 23. 1907.

1,106,067, Patented Aug. 4, 1914,

THE NORRIS PETERS CO, PHOTILI I'IHfl WASHINGTON. U- L,

HENRY A. WISE W001), OF NEW YORK, N. Y.

MEANS FOR KEEPING MARGINS CLEAN IN INTAGLIO-PRINTING.

To all whom it may concern Be it known that I, Hm: RY A. VVIsE VVoon, acitizen of the United States, residing at New York, in the county of NewYork and State of New York, have invented a new and useful Means forKeeping h largins Clean in Intaglio-Printing, of which the following isa specification.

Rotary intaglio printing is used in making silk and cotton prints, andalso, I believe, for wall paper, the machines usually comprising a largeimpression cylinder upon which runs an endless blanket against whichbears a printing cylinder for each color. Each printing cylinder runs ina trough of dye and is cleaned by a cleaning blade. In this type ofmachine the printing cylinders are not positively geared with respect tothe impression cylinder, but are driven by their surfaces contactingtherewith. These printing cylinders or rolls are formed of continuouscopper shells which can be used up almost completely, because in thisstyle of printing when these shells are turned down for re ceiving a newdesign, they can all be turned exactly to the same diameter, and whenadjusted they will run in harmony with each other and registerperfectly. This state of affairs is widely different from that whichexists in printing for magazine, newspaper, and other forms ofperiodicals and commercial papers. In the latter art margins arenecessary, and are separated by a predetermined distance which must bemaintained independently of the size of the printing shells. In thefabric or wall paper printing it does not matter whether the deregisterswith any particular spot on the impression cylinder, as no make-readyupon the impression cylinder is necessary in this variety of printing.In the more exact kinds of printing, however, it is absolutely requisitethat a design meet a fixed point of the impression cylinder at eachoperation of printing, because a make-ready has to be attached to theimpression cylinder. This is necessary because the cleaningblade whichis depended upon to remove ink from the nonprinting portions of anintaglio printing plate for fabric or wall paper does not do so withsufiicient cleanliness for the more particular kinds of periodical, bookor job printing. After the plate has passed there always remains aslight tint. This is a serious obstacle to the success of intaglioprinting, as applied to the finer classes of work, as it re-Specification of Letters Patent.

Application filed January 23, 1907.

Patented A11 at, 1914.

Serial No. 353,631.

sults in soiled margins, which are inadmissible.

The principal object of this invention is to provide means forovercoming this difficulty, so that intaglio printing may be practicallyapplied to these classes of work. This i accomplish by making thepackingof the impression cylinder higher wherethc same registers withthe printing surface than at other points, notably the margins.

Reference is to be had to the accompanying drawings for an illustrationof preferred ways of carrying out this invention, in which l igure 1 isa perspective view of an impression cylinder constructed in accordancewith this invention, and showing how the printing cylinder with anintaglio printing surface registers therewith. Fig. 2 is a transversesectional view of the impression cylinder on an enlarged scale, andFig.3 is a view similar to Fig. 1 showing the invention applied to flatsurfaces.

Referring first to Figs. 1 and 2, it will be seen that the impressioncylinder at is provided with a packing which is cut away at points 6which are under the margins of the intaglio printing shell or plate 0while the packing is high at points b under the illustrations of thesame. illustrations are properly printed, and at the same time cleanwhite margins are obtained, because where the packing is thin there isnot suflicient pressureto transfer the little ink remaining upon theplate to the paper. It is, of course, necessary under this system tomake the printing surface register perfectly with the impressionsurface. This is preferably done by gearing the intaglio plate cylinderwith the impression cylinder by means of gears 7 so that they mayregister the packing as arranged with the design on the intagliosurface. The invention may be carried out either by cutting away thepacking under the margins, or building it up under the illustrations orotherwise making the same thin at the first mentioned points and thickor solid at the others.

In the form shown in Fig. 3 the same principle is applied to a flatprinting surface, an impression cylinder A being pro vided with apacking made thin at certain points B which are to register with themargins of the intaglio surface on the printingplate C, and thick atother points B In this way the r which are to register with theillustrations thereof. In both of these forms the printing surface issubstantially uniform, in these cases either cylindrical or in a plane,so that the cleaning blade can accurately clean the intaglio surface.

While I have illustrated and described certain forms in which theinvention can conveniently be embodied, I am aware that manymodifications may be made therein within the scope of the same, asexpressed in the claim. limited to the particular forms shown, but

What I do claim is In an intaglio printing machine, the combination witha substantially uniform intag'lio printing member having a plurality ofillustrations and margins all of the same Therefore I do not Wish to beheight, of an impression member'having the surface of its packing whichcomes directly in contact with a sheet to be printed cut away to adefinite sharp outline along lines registering with the edges of theillustrations, whereby it is of reduced height under the margins, andmeans for causing the elevated portion of the impression member to bepositively registered with the illust *ations of the printing member.

In testimony whereof l have hereunto set my hand, in the presence of twosubscribing 30 Witnesses.

H. A. WISE WOOD.

lVitnesses MARY E. MGCADDEN, ANNIE B. VALTERS.

(depict of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. G.

